DirectShow® filters are multimedia components that can be used to compress, decompress, process, enhance, or stream video and audio data. Codecs (Compressers-Decompressers) encode (create) and decode (play) audio and video files. LEAD iCompress codecs support industry standards using LEAD's own industry-leading compression algorithms.

Use the LEAD iCompress codecs to compress large media files with no perceivable loss of quality. Additionally, compressing video down to 20% of its original file size makes the video easier to share, stream online, or place on popular handheld devices such as the PSP or iPod.

LEADTOOLS Multimedia Filters

The LEADTOOLS Multimedia SDK includes full or evaluation versions * of all DirectShow and Media Foundation filters. Filters encompass encoders, decoders, multiplexers, demultiplexers, sources, and sinks.

The evaluation download also includes evaluation versions * of the DVD writer, DVD burner, MPEG-1 multiplexer, MPEG-2 multiplexer, ISO multiplexer/demultiplexer, Screen Capture filter, Network filters (source, mux, sink and protocol manager) (TCP/IP, UDP, RTSP), DICOM medical toolkit filters, and more.

Refer to LEADTOOLS DirectShow Filters and LEADTOOLS Media Foundation Filters for a complete listing of available filters. Refer to the Multimedia Product Comparison Chart to see which licensed filters are included with the various LEADTOOLS products.

* For pricing of filter and codec client licenses, contact

Key Features


LEADTOOLS Multimedia features require that DirectShow 8.0 to be installed. There are also a number of files that you must include when you distribute your application. To use the filters in your application, you must expose the ILMMCommon Interface.

Certain filters and codecs require additional deployment licenses in order to be included with your application. For information on licensing the LEADTOOLS Filters and Codecs, refer to Multimedia Filters and Codec Licensing.

Supported Environments

The environments supported depend upon the specific product, platform, and function being used. For more information, refer to Supported Platforms/Operating Systems.

LEADTOOLS Multimedia Suite

The LEADTOOLS Multimedia Suite enhances the LEADTOOLS Multimedia toolkit by unlocking every filter or codec (with the exception of the DICOM Filters). It also includes LEADTOOLS Imaging Pro and the LEADTOOLS Distributed Computing functionality.

Implicitly, it includes all the LEADTOOLS Multimedia Modules, as follows:

LEADTOOLS Medical Multimedia SDK

The LEADTOOLS Medical Multimedia Module includes a suite of state-of-the-art DirectShow filters for compressing and decompressing video and audio data inside DICOM files. This feature-rich product was designed to simplify converting cine images and video streams to DICOM objects. DICOM objects include X-ray Angiography (XA), Ultrasound (US), Visible Light (VL), Secondary Capture (SC) objects, and many more. This Filter Pack uses the most advanced compression DICOM standard algorithms used in the industry, including MPEG-2, Motion JPEG, and JPEG2000.

The Medical Multimedia Module includes two components:

Existing video software, such as Windows Media Player and Ulead Media Studio, use these filters to play the video (cine) data in a DICOM file.

The LEADTOOLS Medical Multimedia SDK Module is included as part of the LEADTOOLS Medical Imaging Suite SDK. It can be added onto the LEADTOOLS Medical Imaging SDK and the LEADTOOLS PACS Imaging SDK. A license for one of these products is required in order to use the LEADTOOLS Medical Multimedia Module. Additional deployment licenses are required to deploy the Medical Multimedia Module to end users. For more information, refer to the LEAD Evaluation Mechanism and the LMDSKernel2 Object topics.


LEADTOOLS DirectShow Filters

LEADTOOLS Multimedia Interfaces and Objects

LEADTOOLS and DirectShow

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